CA2218951A1 - Optical signal power detection with signature bit pattern in wdm systems - Google Patents

Optical signal power detection with signature bit pattern in wdm systems

Info

Publication number
CA2218951A1
CA2218951A1 CA002218951A CA2218951A CA2218951A1 CA 2218951 A1 CA2218951 A1 CA 2218951A1 CA 002218951 A CA002218951 A CA 002218951A CA 2218951 A CA2218951 A CA 2218951A CA 2218951 A1 CA2218951 A1 CA 2218951A1
Authority
CA
Canada
Prior art keywords
optical signal
power
bit pattern
signal power
power detection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002218951A
Other languages
French (fr)
Other versions
CA2218951C (en
Inventor
Richard A. Habel
James Harley
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Northern Telecom Ltd filed Critical Northern Telecom Ltd
Priority to CA002218951A priority Critical patent/CA2218951C/en
Priority to US08/986,027 priority patent/US6239889B1/en
Priority to DE69823609T priority patent/DE69823609T2/en
Priority to EP98308286A priority patent/EP0911994B1/en
Priority to JP10299198A priority patent/JPH11194050A/en
Publication of CA2218951A1 publication Critical patent/CA2218951A1/en
Application granted granted Critical
Publication of CA2218951C publication Critical patent/CA2218951C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0221—Power control, e.g. to keep the total optical power constant

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

The power of an optical signal (s1) travelling on a channel (.lambda.1) of a WDM transmission system, is measured using a signature bit pattern (s BP1) which is inserted in the frame of the optical signal (s1). The power level of s BP1 is adjusted at the launching point to a predetermined ratio (m) with the power of the optical signal. At a point of interest, the fiber is tapped and a fraction of the tapped signal, that includes a corresponding fraction of s BP1, is converted to an electrical signal. The fraction of s BP1 is extracted from a the electrical signal and power of s BP1 is measured. This gives the optical power of s1 as (m) is known and also the calibration constant for the respective channel (.lambda.1) is known. The method can be applied for any and all channels of the WDM transmission system.
CA002218951A 1997-10-22 1997-10-22 Optical signal power detection with signature bit pattern in wdm systems Expired - Fee Related CA2218951C (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CA002218951A CA2218951C (en) 1997-10-22 1997-10-22 Optical signal power detection with signature bit pattern in wdm systems
US08/986,027 US6239889B1 (en) 1997-10-22 1997-12-05 Optical signal power detection with signature bit pattern in WDM systems
DE69823609T DE69823609T2 (en) 1997-10-22 1998-10-13 Monitoring the optical signal power with a signature bit pattern in WDM systems
EP98308286A EP0911994B1 (en) 1997-10-22 1998-10-13 Optical signal power detection with signature bit pattern in WDM systems
JP10299198A JPH11194050A (en) 1997-10-22 1998-10-21 Measuring method for light signal power

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA002218951A CA2218951C (en) 1997-10-22 1997-10-22 Optical signal power detection with signature bit pattern in wdm systems

Publications (2)

Publication Number Publication Date
CA2218951A1 true CA2218951A1 (en) 1999-04-22
CA2218951C CA2218951C (en) 2004-12-07

Family

ID=4161667

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002218951A Expired - Fee Related CA2218951C (en) 1997-10-22 1997-10-22 Optical signal power detection with signature bit pattern in wdm systems

Country Status (5)

Country Link
US (1) US6239889B1 (en)
EP (1) EP0911994B1 (en)
JP (1) JPH11194050A (en)
CA (1) CA2218951C (en)
DE (1) DE69823609T2 (en)

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Publication number Priority date Publication date Assignee Title
JP3922819B2 (en) * 1998-09-21 2007-05-30 富士通株式会社 Error correction method and apparatus
US6748179B2 (en) * 2001-03-07 2004-06-08 Harris Corporation WDM channel monitoring system and method
US7076164B2 (en) * 2001-06-22 2006-07-11 Tellabs Operations, Inc. System and method for measuring power of optical signals carried over a fiber optic link
US7124181B1 (en) 2001-06-29 2006-10-17 Mcafee, Inc. System, method and computer program product for improved efficiency in network assessment utilizing variable timeout values
US6753960B1 (en) 2001-12-05 2004-06-22 Capella Photonics, Inc. Optical spectral power monitors employing frequency-division-multiplexing detection schemes
US7035544B1 (en) 2001-12-27 2006-04-25 Mcafee, Inc. Identification of related communications channels in a wavelength division multiplexed optical network
US20030165343A1 (en) * 2002-03-01 2003-09-04 Dietmar Spanke Optoelectronic communication system
US7209656B2 (en) * 2002-04-12 2007-04-24 Fujitsu Limited Management of optical links using power level information
US7209655B2 (en) * 2002-04-12 2007-04-24 Fujitsu Limited Sharing of power level information to support optical communications
US7212742B2 (en) * 2002-04-12 2007-05-01 Fujitsu Limited Power level management in optical networks
US20040027384A1 (en) * 2002-08-12 2004-02-12 Gilbert Levesque End-to-end tracing of wavelength parameters in a wavelength division multiplexing span of a fiber optic network
EP1769594A1 (en) * 2004-06-30 2007-04-04 Siemens Aktiengesellschaft Method and apparatus for obtaining an optical power level in a pon
US7557789B2 (en) * 2005-05-09 2009-07-07 Texas Instruments Incorporated Data-dependent, logic-level drive scheme for driving LCD panels
CN101938313B (en) * 2010-07-26 2014-04-02 华为技术有限公司 Optical signal processing method, device and system in passive optical network
WO2012031334A1 (en) * 2010-09-10 2012-03-15 Ausanda Communications Pty Ltd Method and apparatus for multi-bit per symbol optical modulation and transmission
US9236939B2 (en) * 2014-06-04 2016-01-12 The United States Of America As Represented By The Secretary Of The Navy Atmospheric transmissometer using a modulated optical source

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54105404A (en) 1978-02-06 1979-08-18 Nec Corp Data transmission system
JPS62139150A (en) 1985-12-12 1987-06-22 Matsushita Electric Ind Co Ltd Optical disk substrate
JPS6385934A (en) 1986-09-30 1988-04-16 Toshiba Corp Intelligent work station
JPS63203027A (en) 1987-02-18 1988-08-22 Mitsubishi Electric Corp Optical relay transmission system
JPH0466835A (en) 1990-07-06 1992-03-03 Advantest Corp Testing device of optical waveguide
JPH05235810A (en) * 1992-02-20 1993-09-10 Nec Corp Remote control system and terminal station equipment used for said system and relay station equipment
EP0721708B1 (en) * 1993-09-30 1999-03-24 ANT Nachrichtentechnik GmbH Fibre-optic communications transmission method and intermediate repeater therefor
US5513029A (en) * 1994-06-16 1996-04-30 Northern Telecom Limited Method and apparatus for monitoring performance of optical transmission systems
CA2155693C (en) * 1994-08-25 1999-12-14 Daniel A. Fishman Performance monitoring and fault location in optical transmission systems
JPH09224016A (en) 1996-02-15 1997-08-26 Nippon Hoso Kyokai <Nhk> Device and method for detecting light intensity
US5699081A (en) * 1996-09-26 1997-12-16 Lucent Technologies Inc. Apparatus and method for automatically provisioning power on a per channel basis in a communications transmission system
US6043915A (en) * 1997-03-31 2000-03-28 Lucent Technologies Inc. Stabilization of a multi-channel optical signal transmitter through correlation feedback
US6111676A (en) * 1998-02-26 2000-08-29 Nortel Networks Corporation Wavelength specific optical reflection meter/locator in signatured wavelength division multiplexed systems

Also Published As

Publication number Publication date
US6239889B1 (en) 2001-05-29
EP0911994B1 (en) 2004-05-06
DE69823609D1 (en) 2004-06-09
DE69823609T2 (en) 2004-09-16
JPH11194050A (en) 1999-07-21
EP0911994A2 (en) 1999-04-28
EP0911994A3 (en) 2001-05-02
CA2218951C (en) 2004-12-07

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